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Trying Spike Filters for tags in PI AF using SQC Analysis

Question asked by Archit on Dec 12, 2018
Latest reply on Dec 13, 2018 by Archit

Hi,

 

I am trying to implement spike filters to avoid negative and unusually low and high values for pi points in PI AF.

I have using SQC analysis and other expression analysis for the same. I am getting results but the filtered value is always the same.

 

So, If the trend the raw value, I have set if values that vary with time but the filtered value is a straight line in a trend. Can somebody please help? Rick Davin

Idea is to have Filter analog input value to remove spikes and outliers using std deviation over the last 5 minutes. Here are snapshots of the analysis.

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I hope this is enough to get some idea as to where i am going wrong. I am always getting same value for filteredval.

 

Regards,

Archit

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